Improvement in hollow augers



W. A. IVES. Hollow Angers.

No. 222,051. Patented Nov. 25, 187 9.

, fiyt/ PATENT OFFICE.

WILLIAM A. IVES, OF HAVEN, CONNECTICUT.

IMPROVEMENT IN HOLLOW AUGERS.

Specification forming part of Letters Patent No. 222,051, dated November25, 1879 application filed August 1, 1879. i

To all whom it may concern:

Be it known that I, WILLIAM A. IVES, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new Improvement inHollow Angers; and I do hereby declare that the following, when taken inconnection with the accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,which said drawings constitute part of this specification, andrepresent, 1n-

Figure 1, front view; Fig. 2, rear View, showing the disk on the head;Fig. 3, side view of the head; Fig. 4, side view of the instrumentcomplete.

This invention relates to an improvement in hollow augersthat is,instruments designed to cut round tenons, as on the ends of spokes andfor similar uses, and particularly to that class which are madeadjustable to out different diameters; and the invention consists in theconstruction as hereinafter described, and particularly recited in theclaim.

A is the head, on which are two parallel guides, B B, arrangedequidistant from the center of the instrument, and constructed as a partof the body C, which terminates in a shank, D,-or other device, by whichthe instrument may be applied to a revolving mandrel.

Between the two guides B B is a slide, E, carrying a cutter, F, the saidslide arranged to be moved toward or from the center a.

On the opposite side of the center, and between the guides B B, is asecond slide, F, also It is essential that the two slides E and F shouldalways retain the same relative position to the center or axis (4 aroundwhich they revolve, and also that when adjusted to the required diameterthey shall be firmly held in that position. To this end I arrange on thehack of the head A a disk, H, concentric with the head and attachedthereto by bolts d e at opposite sides, each extending through a slot,f, the said slot concentric with the head, and so that the disk may bepartially rotated around the center or axis a. In this plate are twoeccentric grooves h t, as seen in Fig. 2, and from the slide E is astud, a, which enters the eccentric slot h, and from the slide F a stud,m, enters the slot 1' in the disk H; hence, owing to the eccentricity ofthe'slots h i, turning the disk H will cause the two slides E F to movetoward orfrom eachother-that is, radially to or from the center a,accordingly as the disk H is turned forward or back, and, the

eccentricity of the two slots being alike, it

follows that the movement of the two slides will be equal.

While theslots h i in the disk will prevent the movement of the slidesexcept when the disk is turned, it is desirable to prevent the disk frombeing accidentally turned. To this end one or both of the studs (1 e isprovided with a set-nut, L, by which the disk may be clamped to the headA;

Other means than the concentric slots f may be employed as a means forsecuring the disk in its place on .the head, it only being essentialthat the disk shall be arranged so as to be rotated and retain itsconcentric position. i

' It will be understood that instead of the eccentric slots h ieccentric ribs may be arranged on the disk to engage with the respectiveslides with the same result. I therefore do not confine my invention tothe use of slots.

I am aware that it is not new to combine, in a hollow auger, a slidecarrying a cutter, and a second slide forming the opposing rest, botharranged to be moved radially to and from the center for the purpose ofadjustment, and therefore do not'claim such invention or anything shownor described here in, except in the combination hereinafter recited.

From the foregoing it will be understood that I do not broadly claim anadjustable cutand F, connected respectively with the slots ter and restin a hollowauger but h and i and bolts 0 01 through the slots f, all

What I do claim is as and for the purpose specified. The disk H,arranged on the back of the WILLIAM A. IVES. head and concentrictherewith, and con- Witnesses: structed with concentric slots f andeccentric JOHN E. EARLE,

slots h and z, combined with the two slides E Jos. EAR-LE.

